Self-fitting candle



March 30,1926. 1579.142

` R. H. PYBUS SELF FITTING CANDLE Fil ed Jan. 20, 1925 ,Zaren/a7 f loose fit, necessitating Patented Mar. 30, i925.

RICHARD HUBERT PYB'US, OF DERBY, ENGLAND.

SELF-FITTING CANDLE.

Application filed January 20, 1925.

To all whom t may concern.'

Be it known that I, RICHARD HUBERT PvnUs,`a subject of the King of Great Britain, residing at Derby, in the county of Derby, England, have invented certain new and useful Improvements in Self-Fitting Cani dles, of which the' following is a specification, reference being had therein tothe accompanying drawing.

, This inif'entionrelates to candles of circu lar section made from paraflin, stearine, ceresine and the like. A defect with such candles is that they rarely lit the hole in the average candle-stick,` being lgenerally a packing with paper andthe like.

I propose to makesuch candles self-fit ting within ordinary limits, by forming integrally with the candle material, a rib or ribs, (hereinafter called ribs) at the base of the candle of sufhcient height from the base to conform with the average depth of the hole in the average Candlestick.

In the accompanying drawing, Fig. l is a side view of a candle embodying one form of my invention.

Fig. 2 is an end view of thesame.

Fig. 8 is a side view of a modification.

It is generally known that self-fitting candles of circular sectionhave been made with ribs at the base, but it was always considered necessary to have these ribs taper, concentrically with the candle, the ribs having the bigger Yexternal diameter at the point furthest removed from the base. This construction called for special moulding machinery as the taper part had to be moulded inV moulds withdrawing one way, whilst the candle proper was being moulded in moulds withdrawing in the opposite direction. Such machines were slow in opera.- tion and the resulting self-fitting candles were always considerably more expensive than the plain ones.

I am aware also that fancy candles of circular cross-section have been manufactured with longitudinal ribs or recesses or with a scroll twist or spirals extending the full length of the candle also with a worm or thread in the form of a screw on the lower end of the candle so that it may be retained firmly in the ordinary candlestick. i

My proposal is to make the external'surface of the ribs parallel with the external surface of the candle itself (which pers :from butt t0 tir) S0 that the candle and the Serial No. 3,635.

ribs can be moulded in the same mould, withdrawing in the same direction. I do not restrict myself to any particular section of rib or to any particular number of ribs which may range from one upwards or to the distance that theribs extend from the base or butt of the candle, subject that such distance does not exceed l". Further the centre line of the ribs may be either parallel with theaxis of the candle or form a spiral round the axis of the same, subject that` the spiral is not so acute as to assume the shape of a screw or to prevent the candle Vfrom being ejected from the mould merely by thrust applied at the top end. The latter does not necessarily show any improvement over the former, but it is a possible form, as spirals can be withdrawn from the mould, the candle moving with a spiral motion in conformity.

The essence of my proposals is to make candles of circular section self-fitting to the Candlestick by the formation of ribs on the surface at the base of such candles as easily as common candles of plain circular section can be made.

Such candles as I propose making will be self-fitting by virtue of the soft-externa] edges of the ribs forming `themselves to the hole in the Candlestick, a tight fit resulting.

lVhile I do not restrict myself in regard to the number of ribs on each candlev there is obviously some number that is most suitable. 'Ihe number that seems to give the best results is three equi-distant ribs which is the smallest number that gives secure location.

Further I do not restrict myself as regards the section or relative size of the ribs, but to make same of a semi-circular section with the flat part towards the candle gives good results. A triangular, square or other section would suit, but would not have any advantage over the one first mentioned. The radii of the semi-circular ribs may be one quarter of the radius of the candle section and it is obvious that it is best to keep the rib relatively thin as compared with the candle itself.

The form of candle embodying my invention and shown in Figures lf and 2 of the drawing is the one I prefer to yadopt as it is found that this form can be manufactured readily and cheaply and in use fulfils the object aimed atrin .a successful manner.

In such form it will he observed that the hody 2 of the candle has formed upon it at the butt end three ribs l equidistantly disposed ahout said hody and of semi-circular cro. 1 section. The important feature about these rihs is that' they are not tapered or heyelled at or towards the lower end as has heretofore heen the ease hut, on the contrary, they are made parallel to the side of the hotly 2 which is slightly taperinf.,Y from :e to tip. rl`hey therefore have their greatest diameter at the hase, which is exactly opposite to rihhed candlesI as previously made. In fact the candle has its largest diameter at the hase or hutt and at this` region not heyelled or tapered. The u three rihs constitute what is found in praetiee to lie au excellent means for rendering` the candle .seltitting` for not only is a threepoint contact obtained in the Candlestick hut the small number of ribs do not otter much res" ltance to the forcing of the hntt end into they hole. A larger numher of ribs otter more resistance than is desirahle as it naturally follows that with a larger numher of rihs a greater amount ot material requires to be stripped from the butt end i. e. from the external faces r sides of the rihs as the candle is inserted hy force into the hole in the candlestick.

Alternatively the rihs l may he inclined on the hotly 2 as shown in Figure 2l huty in any case it is to he noted thatthe hutt end of the candle is non-tapered which feature enables the article to he moulded and withdrawn in a simple manner.

lilith regard to the height from the hutt that the rihs extend up the sides it is ohyious that it serves no useful purpose to carry same higher up than is the depth of the hole in the average Candlestick. I find for a candle 6 inches from hutt to tip a height of 3@ inch sutlicient..

The external surfaces of the rihs ought, theort-tically, to taper towards each other from the butt end of the candle to the tip end and this they will do if same are made parallel to the face of candle as the candle has on it a slight taper from butt to tip.

'he small relatiye height I propose making the rihs, however, ohyiates any disadi'antace in moulding;- it the external surfaces are parallel to the axis of the candle as the shrinkage of the candle material in moulding' enahlcs the latter construction to still leaye the mould. To malte these external surfaces parallel gives goed results.

lt not essential that the centre lines ol the ribs are parallel with the axis of the candle hut this construction the herter result. rhe other alternativel of making;l tl e rihs forni spirals round the candle is a cmnplication that in reality gives no hetter result.

What. l claim then is:-

candle of circular cross section haring formed integrally therewith. at its laitt end. a plurality of rihs equally distant apart and longitudinally of the candle. the distance between the rihs being greater than the width of the rihs and proridincr spaces tor the reception of material displaced circumferentially from the rihs in littina' a candle to a socket.

ln testimony whereof I allix my signature.

RICHARD HUBERT PYIN'S. 

